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Olen nõus

Ülo Lepik

https://www.etis.ee/CV/Ülo_Lepik/est
11.07.1921
737 6419
ulo.lepik@ut.ee

Teenistuskäik

Töökohad ja ametid
1995–...   
Tartu Ülikool, Matemaatika-informaatikateaduskond, Emeriitprofessor (1,00)
01.12.2011–31.12.2014   
Tartu Ülikool, Matemaatika-informaatikateaduskond, Arvutiteaduse instituut, teoreetilise mehaanika spetsialist (0,30)
01.02.2011–30.11.2011   
Tartu Ülikool, Matemaatika-informaatikateaduskond, Arvutiteaduse instituut, teoreetilise mehaanika spetsialist (0,30)
01.02.2006–31.12.2009   
Tartu Ülikool, Matemaatika-informaatikateaduskond, Arvutiteaduse instituut, spetsialist (0,10)
01.01.1959–31.12.2005   
TRÜ, teoreetilise mehaanika kateeder, professor
01.01.1954–31.12.1959   
TRÜ, teoreetilise mehaanika kateeder, dotsent
01.01.1950–31.12.1954   
TRÜ, teoreetilise mehaanika kateeder, vanemõpetaja
01.01.1948–31.12.1950   
TRÜ, teoreetilise mehaanika kateeder, assistent
 
 
Haridustee
1940–1948   
TRÜ
 
 
Teadusorganisatsiooniline ja -administratiivne tegevus
1993−...   
Eesti Teaduste Akadeemia akadeemik
1980−...   
ISSMO liige
Poola mehaanika ühingu välismaine liige
Ajakirja „Mathematical modelling and analysis“ kolleegiumi liige
Ajakirja „Eesti Teaduste Akadeemia Toimetised“ kolleegiumi liige

Kvalifikatsioon

Teaduskraadid
Ülo Lepik, doktorikraad, 1958, (juh) -, Некоторые вопросы равновесия упруго-пластических пластинок и стержней (Elastsete-plastsete plaatide ja varraste mõningaid tasakaaluküsimusi), Moskva Riiklik Ülikool.
 
 
Teaduspreemiad ja tunnustused
2006, Ülo Lepik, Tartu Ülikooli aumärk
2001, Ülo Lepik, Eesti Teaduste Akadeemia medal
1997, Ülo Lepik, Riigivapi teenetemärgi 4. järk
1996, Ülo Lepik, Tartu Ülikooli medal
1993, Ülo Lepik, Eesti Teaduste Akadeemia akadeemik
1990, Ülo Lepik, Tartu Ülikooli medal
1982, Ülo Lepik, Tartu Ülikooli medal
 
 
Teadustöö põhisuunad
VALDKOND: 4. Loodusteadused ja tehnika; 4.4. Matemaatika; PÕHISUUND: Lainikute rakendused diferentsiaal-ja integraalvõrrandite integreerimiseks
VALDKOND: 4. Loodusteadused ja tehnika; 4.4. Matemaatika; PÕHISUUND: Elastsete-plastsete konstruktsioonide dünaamika
VALDKOND: 4. Loodusteadused ja tehnika; 4.4. Matemaatika
VALDKOND: 4. Loodusteadused ja tehnika; 4.4. Matemaatika; PÕHISUUND: Mittelineaarsed võnkumised ja kaos
VALDKOND: 4. Loodusteadused ja tehnika; 4.4. Matemaatika
 
 
Lisainfo
füüsika-matemaatikadoktor
Moskva Riiklik Ülikool, 1958

Juhendatud väitekirjad

Publikatsioonid

Klass
Aasta
Publikatsioon
 
2.1.
2014
Lepik, Ülo; Hein, Helle (2014). Haar Wavelets: With Applications. Springer.
1.1.
2012
Hein, Helle; Lepik, Ülo (2012). Learning Trajectories of Dynamical Systems. Mathematical Modelling and Analysis, 17 (4), 519−531.10.3846/13926292.2012.706654.
1.2.
2012
Lepik, Ülo (2012). Exploring vibrations of cracked beams by the Haar wavelet method. Estonian Journal of Engineering, 18 (1), 58−75.10.3176/eng.2012.1.05.
1.1.
2011
Lepik, Ülo (2011). Solving PDEs with the aid of two-dimensional Haar wavelets. Computers & Mathematics with Applications, 61 (7), 1873−1879.
1.2.
2011
Lepik, Ülo (2011). Buckling of elastic beams by the Haar wavelet method. Estonian Journal of Engineering, 17 (3), 271−284.
1.1.
2009
Lepik, Ülo (2009). Solving fractional integral equations by the Haar wavelet method. Applied Mathematics and Computation, 214 (2), 468−478.10.1016/j.amc.2009.04.015.
1.1.
2009
Lepik, Ü. (2009). Haar Wavelet Method for Solving Stiff Differential Equations. Mathematical Modelling and Analysis, 14 (4), 467−481.10.3846/1392-6292.2009.14.467-481.
1.1.
2009
Lepik, Ü. (2009). Solution of optimal control problems via Haar wavelets. International Journal of Pure and Applied Mathematics, 55 (1), 81−94.
3.4.
2009
Lepik, Ü.; Hein, H. (2009). Can noise annihilate chaos? 4th International Conference on Physics and Control, Physcon 2009: 4th International Conference on Physics and Control, Universita degli Studi di Catania, September 1-4, 2009. Ed. L. Fortuna, M. Frasca. Catania,.
1.1.
2008
Lepik, Ü. (2008). Solving integral and differential equations by the aid of nonuniform Haar wavelets. Applied Mathematics and Computation, 198 (1), 326−332.10.1016/j.amc.2007.08.036.
1.2.
2008
Lepik, Ü. (2008). Solving differential and integral equations by the Haar wavelet method; revisited. International Journal of Mathematics and Computation, 1, 43−52.
1.2.
2008
Lepik, Ü. (2008). Haar wavelet method for solving higher order differential equations. International Journal of Mathematics and Computation, 1, 84−94.
3.2.
2008
Hein, H.; Lepik, Ü. (2008). Regularization of the Trajectories of Dynamical Systems by Adjusting Parameters. Proceedings Of World Academy Of Science, Engineering And Technology, 33: AMSC 2008 : "International Conference on Applied Mathematics and Scientific Computing"; Heidelberg, Germany; 24-26 September, 2008. Heidelberg: Heidelberger Akademie der Wissenschaften, 328−332.
1.1.
2007
Lepik, Ü. (2007). Numerical solution of evolution equations using Haar wavelet method. Applied Mathematics and Computation, 185 (1), 695−704.DOI:10.1016/j.amc.2006.07.077.
1.1.
2007
Hein, H.; Lepik, Ü. (2007). Response of nonlinear oscillators with random frequency of excitation, revisited. Journal of Sound and Vibration, 301, 1040−1049.
1.2.
2007
Lepik, Ü. (2007). Application of the Haar wavelet transform to solving integral and differential equations. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 56 (1), 28−46.
1.2.
2007
Lepik, Ü.; Tamme, E. (2007). Solution of nonlinear Fredholm integral equations via the Haar wavelet method. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 56 (1), 17−27.
3.1.
2007
Lepik, Ü. (2007). Application of nonuniform Haar wavelets for solving integral and differential equations. Proceedings of SPIE Wavelet Applications in Industrial Processing, 6763: Wavelet Applications in Industrial Processing; Boston, MA; 11-12.September 2007. Ed. Truchetet, F.; Laligant, O. SPIE, 676306-1−676306-8.
3.2.
2007
Lepik, Ü. (2007). Lainikute rakendamine diferentsiaal- ja integraalvõrrandite lahendamiseks. R.Küttner (Toim.). Teadusmõte Eeestis (IV), Tehnikateadused (II), Eesti Teaduste Akadeemia (81−84).. Tallinn: Eesti Teaduste Akadeemia.
6.3.
2007
Lepik, Ü.; Lellep, J. (2007). Teoreetilise mehaanika kateeder (õppetool). Abel, Mati; Kolk, Enno (Toim.). Matemaatika-informaatikateaduskond 40 (135−140).. Tartu Ülikooli Kirjastus.
1.1.
2006
Lepik, Ü. (2006). Haar wavelet method for nonlinear integro-differential equations. Applied Mathematics and Computation, 176 (1), 324−333.
3.4.
2006
Lepik, Ü. (2006). Haar wavelet method for solving integral equations and evolution equations. III European Conference on Comput. Mechanics; Lisboa, Portugal; 5-9 June, 2006. Lissabon, Portugal, 1−11. (CD-Proceedings; paper nr 1478).
5.2.
2006
Lepik, Ü. (2006). Haar wavelet method for solving evolution equations. Dynamic Days Europe 2006; Crete, Greece; September 25-29, 2006. 76.
6.3.
2006
Lepik, Ü. (2006). Arvamusi akadeemikutelt: teaduse populariseerimine. Eesti Teaduste Akadeemia Aastaraamat, XI (38), 188−189.
1.1.
2005
Lepik, U.; Hein, H. (2005). On response of nonlinear oscillators with random frequency of excitation. Journal of Sound and Vibration, 288, 275−292.
1.1.
2005
Lepik, U. (2005). Numerical solution of differential equations using Haar wavelets. Mathematics and Computers in Simulation, 68 (2), 127−143.
3.2.
2005
Lepik, Ü.; Tamme, E. (2005). Application of the Haar Wavelets for Solution of Linear Integral Equations. 2004 - Dynamical Systems and Applications: Dynamical Systems and Applications; Antalya, Turkey; 5-10 July, 2004. Ed. Akca, H.; Boucherif, A.; Covachev, V. GBS Publishers&Distributors (India), 494−507.
5.2.
2005
Hein, H; Lepik, Ü (2005). The effect of random frequency on chaotic motion of some nonlinear oscillators. Proceedings of Dynamics Days 2005, Berlin 25-28 July, 2005, pp97: Dynamics Days 2005, Berlin 25-28 July, 2005. 97−97.
3.4.
2004
Hein, H.; Lepik, Ü. (2004). On Stochastic response of Nonlinear Oscillators. Proceedings International Conference: Dynamical Systems and Applications. Antalya, Turkey, 395-407.
1.2.
2003
Lepik, Ü. (2003). Exploring irregular vibrations and chaos by the wavelet method. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 9 (1), 3−24.
1.3.
2003
Lepik, Ü. (2003). Mis on lainikud? Akadeemia, 15 (6), 1272−1281.
3.4.
2003
Lepik, Ü. (2003). Vibrations of elastic-plastic beams by Galerkin's method. Plasticity and Impact Mechanics, 1: 8th International Symposium on IMPLAST 2003; New Dehli, India; March 16-19, 2003. Ed. Gupta, N.K. Phoenix Publishing House, 1075−1083.
1.1.
2002
Lepik, U. (2002). Optimal location of a circular support for nonaxisymmetric buckling of annular plates. Structural and Multidisciplinary Optimization, 23 (3), 252−256.
1.2.
2002
Lepik, Ü. (2002). Non-axisymmetric buckling of elastic-plastic annular plates. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 51 (2), 86−104.
3.2.
2002
Lepik, Ü.; Lellep, J. (2002). Elastsus- ja plastsusteooriaalasest uurimistööst Tartu Ülikoolis. Engelbrecht, J.; Küttner, R. (Toim.). Teadusmõte Eestis. Tehnikateadused (59−62).. Tallinn: Eesti Teaduste Akadeemia.
3.4.
2002
Lepik, Ü. (2002). Exploring chaos by the wavelet method. 79: First International Congress on Mechatronics; Linz, Austria; July 3-6, 2000. 1−4.
1.1.
2001
Lepik, U. (2001). Dynamic buckling of elastic-plastic beams including effects of axial stress waves. International Journal of Impact Engineering, 25 (6), 537−552.
1.2.
2001
Lepik, Ü. (2001). Application of wavelet transform techniques to vibration study. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 50 (3), 155−168.
3.4.
2001
Lepik, Ü. (2001). Vibrations of elastic-plastic structures by Galerkin's method. Elasticity and anelasticity, Moscow, 2001. Ed. Kiyko, A.; Brovko, G.I. Moscow: Moscow University Press, 331−343.
1.1.
2000
Lepik, U. (2000). On dynamic buckling of elastic-plastic beams. International Journal of Non-Linear Mechanics, 35 (4), 721−734.
1.1.
1999
Lepik, U. (1999). Bifurcation analysis of elastic-plastic cylindrical shells. International Journal of Non-Linear Mechanics, 34 (2), 299−311.
6.2.
1999
Engelbrecht, J.; Lepik, Ü. (1999). Kaoseraamat. Tallinn: Teaduste Akadeemia Kirjastus.
1.1.
1998
Lepik, U. (1998). Contribution to bifurcation analysis of elastic-plastic beams. International Journal of Impact Engineering, 21, 35−49.
1.1.
1998
Lepik, U. (1998). Shape optimization of dynamically loaded viscoelastic cylindrical shells. Structural Optimization, 15 (1), 57−62.
1.1.
1998
Lepik, U. (1998). On plastic buckling of cylindrical shells struck axially with a mass. International Journal of Non-Linear Mechanics, 33 (2), 235−246.
1.1.
1998
Lepik, U. (1998). On optimal design of compressed beams with an additional lateral support. Structural Optimization, 16 (4), 275−279.
1.1.
1996
Lepik, U. (1996). Axisymmetric vibrations of elastic-plastic cylindrical shells by Galerkin's method. International Journal of Impact Engineering, 18 (5), 489−504.
1.1.
1996
Lepik, U. (1996). Commemorative issue in honour of Professor P.S. Symonds' 80th birthday - Tribute. International Journal of Impact Engineering, 18, R18−R19.
1.1.
1995
Lepik, U. (1995). Elastic-plastic vibrations of a buckled beam. International Journal of Non-Linear Mechanics, 30 (2), 129−139.
1.1.
1995
Lepik, U. (1995). Optimal-design of elastic-plastic beams with additional supports. Structural Optimization, 9 (1), 18−24.
1.1.
1994
Lepik, U. (1994). Dynamic-response of elastic-plastic beams with axial constraints. International Journal of Impact Engineering, 15 (1), 3−16.
1.1.
1994
Lepik, U. (1994). Dynamic-response of elastic-plastic pin-ended beams by galerkins method. International Journal of Solids and Structures, 31 (23), 3249−3260.
1.1.
1994
Lepik, U. (1994). Impulsively loaded fully fixed-ended elastic-plastic beams by galerkin method. International Journal of Impact Engineering, 15 (1), 17−23.
1.1.
1994
Lepik, U. (1994). Optimal-design of elastic-plastic stepped beams under dynamic loading. Structural Optimization, 7, 87−90.
1.1.
1994
Lepik, U. (1994). Vibrations of elastic-plastic fully clamped beams and flat arches under impulsive loading. International Journal of Non-Linear Mechanics, 29 (4), 613−623.
1.1.
1993
Lepik, U. (1993). Optimal-design of rigid-plastic structures under dynamic loading. Structural Optimization, 6 (1), 15−18.
1.2.
1985
Lepik, Ülo (1985). Optimal design of elastic beams with segmentwise constant height in the case of dynamic loading. International Journal of Impact Engineering, 3 (2), 77−91.10.1016/0734-743X(85)90027-2.
1.1.
1984
Lellep, J.; Lepik, U. (1984). Analytical methods in plastic structural design. Engineering Optimization, 7 (3), 209−239.
1.1.
1983
Lepik, U.; Just, M. (1983). Automatic calculation for bending of rigid-plastic beams under dynamic loading. Computer Methods in Applied Mechanics and Engineering, 38 (1), 19−28.
1.1.
1982
Lepik, U. (1982). Optimal-design of rigid-plastic simply supported beams under dynamic pressure loading. International Journal of Solids and Structures, 18 (4), 285−295.
1.1.
1981
Lepik, U. (1981). On optimal-design of rigid plastic beams with additional supports in the case of impulsive loading. International Journal of Non-Linear Mechanics, 16 (1), 19−26.
1.1.
1981
Lepik, U. (1981). Optimal-design of rigid-plastic simply supported beams under impulsive loading. International Journal of Solids and Structures, 17 (6), 617−629.
1.1.
1980
Lepik, U. (1980). On the dynamic-response of rigid-plastic beams. Journal of Structural Mechanics, 8 (3), 227−235.
1.1.
1978
Lepik, U. (1978). Optimal design of beams with minimum compliance. International Journal of Non-Linear Mechanics, 13 (1), 33−42.
1.1.
1977
Lepik, U.; Mroz, Z. (1977). Optimal design of plastic structures under impulsive and dynamic pressure loading. International Journal of Solids and Structures, 13 (7), 657−674.

Ülo Lepik

https://www.etis.ee/CV/Ülo_Lepik/eng
11.07.1921
737 6419
ulo.lepik@ut.ee

Career

Institution and occupation
1995–...   
University of Tartu, Faculty of Mathematics and Computer Science, Professor emeritus (1,00)
prof. emer. alates 1995
University of Tartu
01.12.2011–31.12.2014   
University of Tartu, Faculty of Mathematics and Computer Science, Institute of Computer Science, Specialist in Theoretical Mechanics (0,30)
01.02.2011–30.11.2011   
University of Tartu, Faculty of Mathematics and Computer Science, Institute of Computer Science, Specialist in Theoretical Mechanics (0,30)
01.02.2006–31.12.2009   
University of Tartu, Faculty of Mathematics and Computer Science, Institute of Computer Science, Specialist (0,10)
01.01.1959–31.12.2005   
professor - 1959 - 2005
01.01.1954–31.12.1959   
docent - 1954 - 1959
01.01.1950–31.12.1954   
senior teacher - 1950 - 1954
01.01.1948–31.12.1950   
assistant - 1948 - 1950
 
 
Education
1940–1948   
Graduated University of Tartu 1948
 
 
R&D related managerial and administrative work
1980−...   
Member of ISSMO
Foreign Member of Society of Mechanics of Poland
Member of Editorial Board of „Mathematical modelling and analysis“
Member of Editorial Board of „Proceedings of Estonian Academy of Sciences"

Qualifications

Academic degrees
Ülo Lepik, Doctor's Degree, 1958, (sup) -, Некоторые вопросы равновесия упруго-пластических пластинок и стержней, Moscow State University.
 
 
Honours & awards
2006, Ülo Lepik, order of merit of Tartu University
2001, Ülo Lepik, medal of Estonian Academy of Sciences
1997, Ülo Lepik, State coat of arms 4 degree
1996, Ülo Lepik, medal of University of Tartu
1993, Ülo Lepik, Academician of Estonian Academy of Sciences
1990, Ülo Lepik, medal of University of Tartu
1982, Ülo Lepik, medal of University of Tartu
 
 
Field of research
FIELD OF RESEARCH: 4. Natural Sciences and Engineering; 4.4. Mathematics
FIELD OF RESEARCH: 4. Natural Sciences and Engineering; 4.4. Mathematics
FIELD OF RESEARCH: 4. Natural Sciences and Engineering; 4.4. Mathematics
FIELD OF RESEARCH: 4. Natural Sciences and Engineering; 4.4. Mathematics
FIELD OF RESEARCH: 4. Natural Sciences and Engineering; 4.4. Mathematics
 
 
Additional information
Doctor of Science Moscow State University, 1958

Supervised dissertations

Publications

Category
Year
Publication
 
2.1.
2014
Lepik, Ülo; Hein, Helle (2014). Haar Wavelets: With Applications. Springer.
1.1.
2012
Hein, Helle; Lepik, Ülo (2012). Learning Trajectories of Dynamical Systems. Mathematical Modelling and Analysis, 17 (4), 519−531.10.3846/13926292.2012.706654.
1.2.
2012
Lepik, Ülo (2012). Exploring vibrations of cracked beams by the Haar wavelet method. Estonian Journal of Engineering, 18 (1), 58−75.10.3176/eng.2012.1.05.
1.1.
2011
Lepik, Ülo (2011). Solving PDEs with the aid of two-dimensional Haar wavelets. Computers & Mathematics with Applications, 61 (7), 1873−1879.
1.2.
2011
Lepik, Ülo (2011). Buckling of elastic beams by the Haar wavelet method. Estonian Journal of Engineering, 17 (3), 271−284.
1.1.
2009
Lepik, Ülo (2009). Solving fractional integral equations by the Haar wavelet method. Applied Mathematics and Computation, 214 (2), 468−478.10.1016/j.amc.2009.04.015.
1.1.
2009
Lepik, Ü. (2009). Haar Wavelet Method for Solving Stiff Differential Equations. Mathematical Modelling and Analysis, 14 (4), 467−481.10.3846/1392-6292.2009.14.467-481.
1.1.
2009
Lepik, Ü. (2009). Solution of optimal control problems via Haar wavelets. International Journal of Pure and Applied Mathematics, 55 (1), 81−94.
3.4.
2009
Lepik, Ü.; Hein, H. (2009). Can noise annihilate chaos? 4th International Conference on Physics and Control, Physcon 2009: 4th International Conference on Physics and Control, Universita degli Studi di Catania, September 1-4, 2009. Ed. L. Fortuna, M. Frasca. Catania,.
1.1.
2008
Lepik, Ü. (2008). Solving integral and differential equations by the aid of nonuniform Haar wavelets. Applied Mathematics and Computation, 198 (1), 326−332.10.1016/j.amc.2007.08.036.
1.2.
2008
Lepik, Ü. (2008). Solving differential and integral equations by the Haar wavelet method; revisited. International Journal of Mathematics and Computation, 1, 43−52.
1.2.
2008
Lepik, Ü. (2008). Haar wavelet method for solving higher order differential equations. International Journal of Mathematics and Computation, 1, 84−94.
3.2.
2008
Hein, H.; Lepik, Ü. (2008). Regularization of the Trajectories of Dynamical Systems by Adjusting Parameters. Proceedings Of World Academy Of Science, Engineering And Technology, 33: AMSC 2008 : "International Conference on Applied Mathematics and Scientific Computing"; Heidelberg, Germany; 24-26 September, 2008. Heidelberg: Heidelberger Akademie der Wissenschaften, 328−332.
1.1.
2007
Lepik, Ü. (2007). Numerical solution of evolution equations using Haar wavelet method. Applied Mathematics and Computation, 185 (1), 695−704.DOI:10.1016/j.amc.2006.07.077.
1.1.
2007
Hein, H.; Lepik, Ü. (2007). Response of nonlinear oscillators with random frequency of excitation, revisited. Journal of Sound and Vibration, 301, 1040−1049.
1.2.
2007
Lepik, Ü. (2007). Application of the Haar wavelet transform to solving integral and differential equations. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 56 (1), 28−46.
1.2.
2007
Lepik, Ü.; Tamme, E. (2007). Solution of nonlinear Fredholm integral equations via the Haar wavelet method. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 56 (1), 17−27.
3.1.
2007
Lepik, Ü. (2007). Application of nonuniform Haar wavelets for solving integral and differential equations. Proceedings of SPIE Wavelet Applications in Industrial Processing, 6763: Wavelet Applications in Industrial Processing; Boston, MA; 11-12.September 2007. Ed. Truchetet, F.; Laligant, O. SPIE, 676306-1−676306-8.
3.2.
2007
Lepik, Ü. (2007). Lainikute rakendamine diferentsiaal- ja integraalvõrrandite lahendamiseks. R.Küttner (Toim.). Teadusmõte Eeestis (IV), Tehnikateadused (II), Eesti Teaduste Akadeemia (81−84).. Tallinn: Eesti Teaduste Akadeemia.
6.3.
2007
Lepik, Ü.; Lellep, J. (2007). Teoreetilise mehaanika kateeder (õppetool). Abel, Mati; Kolk, Enno (Toim.). Matemaatika-informaatikateaduskond 40 (135−140).. Tartu Ülikooli Kirjastus.
1.1.
2006
Lepik, Ü. (2006). Haar wavelet method for nonlinear integro-differential equations. Applied Mathematics and Computation, 176 (1), 324−333.
3.4.
2006
Lepik, Ü. (2006). Haar wavelet method for solving integral equations and evolution equations. III European Conference on Comput. Mechanics; Lisboa, Portugal; 5-9 June, 2006. Lissabon, Portugal, 1−11. (CD-Proceedings; paper nr 1478).
5.2.
2006
Lepik, Ü. (2006). Haar wavelet method for solving evolution equations. Dynamic Days Europe 2006; Crete, Greece; September 25-29, 2006. 76.
6.3.
2006
Lepik, Ü. (2006). Arvamusi akadeemikutelt: teaduse populariseerimine. Eesti Teaduste Akadeemia Aastaraamat, XI (38), 188−189.
1.1.
2005
Lepik, U.; Hein, H. (2005). On response of nonlinear oscillators with random frequency of excitation. Journal of Sound and Vibration, 288, 275−292.
1.1.
2005
Lepik, U. (2005). Numerical solution of differential equations using Haar wavelets. Mathematics and Computers in Simulation, 68 (2), 127−143.
3.2.
2005
Lepik, Ü.; Tamme, E. (2005). Application of the Haar Wavelets for Solution of Linear Integral Equations. 2004 - Dynamical Systems and Applications: Dynamical Systems and Applications; Antalya, Turkey; 5-10 July, 2004. Ed. Akca, H.; Boucherif, A.; Covachev, V. GBS Publishers&Distributors (India), 494−507.
5.2.
2005
Hein, H; Lepik, Ü (2005). The effect of random frequency on chaotic motion of some nonlinear oscillators. Proceedings of Dynamics Days 2005, Berlin 25-28 July, 2005, pp97: Dynamics Days 2005, Berlin 25-28 July, 2005. 97−97.
3.4.
2004
Hein, H.; Lepik, Ü. (2004). On Stochastic response of Nonlinear Oscillators. Proceedings International Conference: Dynamical Systems and Applications. Antalya, Turkey, 395-407.
1.2.
2003
Lepik, Ü. (2003). Exploring irregular vibrations and chaos by the wavelet method. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 9 (1), 3−24.
1.3.
2003
Lepik, Ü. (2003). Mis on lainikud? Akadeemia, 15 (6), 1272−1281.
3.4.
2003
Lepik, Ü. (2003). Vibrations of elastic-plastic beams by Galerkin's method. Plasticity and Impact Mechanics, 1: 8th International Symposium on IMPLAST 2003; New Dehli, India; March 16-19, 2003. Ed. Gupta, N.K. Phoenix Publishing House, 1075−1083.
1.1.
2002
Lepik, U. (2002). Optimal location of a circular support for nonaxisymmetric buckling of annular plates. Structural and Multidisciplinary Optimization, 23 (3), 252−256.
1.2.
2002
Lepik, Ü. (2002). Non-axisymmetric buckling of elastic-plastic annular plates. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 51 (2), 86−104.
3.2.
2002
Lepik, Ü.; Lellep, J. (2002). Elastsus- ja plastsusteooriaalasest uurimistööst Tartu Ülikoolis. Engelbrecht, J.; Küttner, R. (Toim.). Teadusmõte Eestis. Tehnikateadused (59−62).. Tallinn: Eesti Teaduste Akadeemia.
3.4.
2002
Lepik, Ü. (2002). Exploring chaos by the wavelet method. 79: First International Congress on Mechatronics; Linz, Austria; July 3-6, 2000. 1−4.
1.1.
2001
Lepik, U. (2001). Dynamic buckling of elastic-plastic beams including effects of axial stress waves. International Journal of Impact Engineering, 25 (6), 537−552.
1.2.
2001
Lepik, Ü. (2001). Application of wavelet transform techniques to vibration study. Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 50 (3), 155−168.
3.4.
2001
Lepik, Ü. (2001). Vibrations of elastic-plastic structures by Galerkin's method. Elasticity and anelasticity, Moscow, 2001. Ed. Kiyko, A.; Brovko, G.I. Moscow: Moscow University Press, 331−343.
1.1.
2000
Lepik, U. (2000). On dynamic buckling of elastic-plastic beams. International Journal of Non-Linear Mechanics, 35 (4), 721−734.
1.1.
1999
Lepik, U. (1999). Bifurcation analysis of elastic-plastic cylindrical shells. International Journal of Non-Linear Mechanics, 34 (2), 299−311.
6.2.
1999
Engelbrecht, J.; Lepik, Ü. (1999). Kaoseraamat. Tallinn: Teaduste Akadeemia Kirjastus.
1.1.
1998
Lepik, U. (1998). Contribution to bifurcation analysis of elastic-plastic beams. International Journal of Impact Engineering, 21, 35−49.
1.1.
1998
Lepik, U. (1998). Shape optimization of dynamically loaded viscoelastic cylindrical shells. Structural Optimization, 15 (1), 57−62.
1.1.
1998
Lepik, U. (1998). On plastic buckling of cylindrical shells struck axially with a mass. International Journal of Non-Linear Mechanics, 33 (2), 235−246.
1.1.
1998
Lepik, U. (1998). On optimal design of compressed beams with an additional lateral support. Structural Optimization, 16 (4), 275−279.
1.1.
1996
Lepik, U. (1996). Axisymmetric vibrations of elastic-plastic cylindrical shells by Galerkin's method. International Journal of Impact Engineering, 18 (5), 489−504.
1.1.
1996
Lepik, U. (1996). Commemorative issue in honour of Professor P.S. Symonds' 80th birthday - Tribute. International Journal of Impact Engineering, 18, R18−R19.
1.1.
1995
Lepik, U. (1995). Elastic-plastic vibrations of a buckled beam. International Journal of Non-Linear Mechanics, 30 (2), 129−139.
1.1.
1995
Lepik, U. (1995). Optimal-design of elastic-plastic beams with additional supports. Structural Optimization, 9 (1), 18−24.
1.1.
1994
Lepik, U. (1994). Dynamic-response of elastic-plastic beams with axial constraints. International Journal of Impact Engineering, 15 (1), 3−16.
1.1.
1994
Lepik, U. (1994). Dynamic-response of elastic-plastic pin-ended beams by galerkins method. International Journal of Solids and Structures, 31 (23), 3249−3260.
1.1.
1994
Lepik, U. (1994). Impulsively loaded fully fixed-ended elastic-plastic beams by galerkin method. International Journal of Impact Engineering, 15 (1), 17−23.
1.1.
1994
Lepik, U. (1994). Optimal-design of elastic-plastic stepped beams under dynamic loading. Structural Optimization, 7, 87−90.
1.1.
1994
Lepik, U. (1994). Vibrations of elastic-plastic fully clamped beams and flat arches under impulsive loading. International Journal of Non-Linear Mechanics, 29 (4), 613−623.
1.1.
1993
Lepik, U. (1993). Optimal-design of rigid-plastic structures under dynamic loading. Structural Optimization, 6 (1), 15−18.
1.2.
1985
Lepik, Ülo (1985). Optimal design of elastic beams with segmentwise constant height in the case of dynamic loading. International Journal of Impact Engineering, 3 (2), 77−91.10.1016/0734-743X(85)90027-2.
1.1.
1984
Lellep, J.; Lepik, U. (1984). Analytical methods in plastic structural design. Engineering Optimization, 7 (3), 209−239.
1.1.
1983
Lepik, U.; Just, M. (1983). Automatic calculation for bending of rigid-plastic beams under dynamic loading. Computer Methods in Applied Mechanics and Engineering, 38 (1), 19−28.
1.1.
1982
Lepik, U. (1982). Optimal-design of rigid-plastic simply supported beams under dynamic pressure loading. International Journal of Solids and Structures, 18 (4), 285−295.
1.1.
1981
Lepik, U. (1981). On optimal-design of rigid plastic beams with additional supports in the case of impulsive loading. International Journal of Non-Linear Mechanics, 16 (1), 19−26.
1.1.
1981
Lepik, U. (1981). Optimal-design of rigid-plastic simply supported beams under impulsive loading. International Journal of Solids and Structures, 17 (6), 617−629.
1.1.
1980
Lepik, U. (1980). On the dynamic-response of rigid-plastic beams. Journal of Structural Mechanics, 8 (3), 227−235.
1.1.
1978
Lepik, U. (1978). Optimal design of beams with minimum compliance. International Journal of Non-Linear Mechanics, 13 (1), 33−42.
1.1.
1977
Lepik, U.; Mroz, Z. (1977). Optimal design of plastic structures under impulsive and dynamic pressure loading. International Journal of Solids and Structures, 13 (7), 657−674.
Detailne otsing
  • Leitud 6 kirjet
ProgrammLiikNumberNimiProjekti algusProjekti lõppVastutav täitjaAsutusFinantseerijapoolne rahastamine
IUTIUT20-57Analüüsi, algebra ja geomeetria struktuursed probleemid ning rakendused arvutusmatemaatikas01.01.201431.12.2019Eve OjaTartu Ülikool, Loodus- ja täppisteaduste valdkond, matemaatika ja statistika instituut1 220 000,00 EUR
ETFETF6697Dünaamiliste süsteemide modelleerimine lainikute ja tehisnärvivõrkude abil01.01.200631.12.2009Helle HeinTartu Ülikool; Tartu Ülikool, Matemaatika-informaatikateaduskond22 778,12 EUR
ETFETF7461Elastsete ja mitteelastsete koorikute optimiseerimine01.01.200831.12.2011Jaan LellepTartu Ülikool, Matemaatika-informaatikateaduskond35 521,01 EUR
ETFETF8830Elastsete konstruktsioonide modelleerimine lainikutega purunemise korral01.01.201130.06.2015Helle HeinTartu Ülikool, Matemaatika-informaatikateaduskond44 160,00 EUR
SFSF0180081s08Rakendusmatemaatika ja mehaanika mudelid01.01.200831.12.2013Jaan LellepTartu Ülikool, Matemaatika-informaatikateaduskond547 776,16 EUR
SFSF0182559s03Rakendusmatemaatika ja mehaanika ülesannete modelleerimine01.01.200331.12.2007Jaan LellepTartu Ülikool, Matemaatika-informaatikateaduskond194 738,78 EUR